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#!/usr/bin/env python
import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4.QtSvg import QSvgGenerator
if __name__ == "__main__":
app = QApplication(sys.argv)
#device = QSvgGenerator()
#device.setFileName("qpen-dashpattern.svg")
#device.setSize(QSize(216, 144))
#device.setResolution(72)
device = QImage(192, 144, QImage.Format_ARGB32)
device.fill(qRgba(0, 0, 0, 0))
#resolution = device.resolution() # dpi
#dpp = resolution / 72.0
p = QPainter()
p.begin(device)
width = 8
pen = QPen()
pen.setWidth(width)
pen.setDashPattern([4, 2])
pen.setCapStyle(Qt.FlatCap)
faded_pen = QPen()
faded_pen.setWidth(width)
faded_pen.setDashPattern([4, 2])
faded_pen.setColor(QColor(160, 160, 160))
faded_pen.setCapStyle(Qt.FlatCap)
font = QFont("Monospace")
font.setPointSize(12)
p.setFont(font)
p.setBrush(QColor(160, 0, 0))
for x in range(-6, 9):
if x % 4 == 0:
length = 6
else:
length = 2
p.drawLine(64 + x * width, 4, 64 + x * width, 4 + length)
p.drawLine(64 + x * width, 136, 64 + x * width, 136 - length)
offsets = (0, 2, 3.5, 4, 5, 6)
for i in range(len(offsets)):
offset = offsets[i]
pen.setDashOffset(offset)
p.setPen(faded_pen)
p.drawLine(64 - offset * width, 20 + (i * 20), 64, 20 + (i * 20))
p.setPen(pen)
p.drawLine(64, 20 + (i * 20), 128, 20 + (i * 20))
p.drawText(150, 25 + (i * 20), str(offset))
p.end()
device.save("qpen-dashpattern.png")
sys.exit()
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